Selection is one of the three logical structures in programming that allows you to control the flow of the program. You do this by giving a condition and if it's met, do something. If it is not met, do something else. This is just a simple example (it could get more complicated than this).
Real world example: If it is your birthday, play a birthday song. Else, play classical music.
Visualization:
Using the previous example, 1 would be “is today your birthday?”, 2 would be “play a birthday song” and 4 would be “play classical music.”
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